Electric condenser



May 5, 1925.

E. THMSON ELECTRIC CONDENSER Fld May 24, 1921 2 Sheets-Sheet 1 f//ls Wmo/"neg Patented May `5, 1925.

` 1,536,948- l UNITED sTATEs PATENT oFFicE.

ELIHUTHOMSON, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNORTO GENERAL ELEC- TRIC COMPANY, A CORPORATION 0F NEW YORK.

' ELECTRIC coNnENsER.

`Application led May 24,

which is formed of a roll of alternate conducting and insulating sheets and is enclosed in a suitable casing which is adapted to contain a lling of insulating material.

lVith these and other obiects in view, referen-ce is had to the accompanying drawings, where Fig. 1, represents in section a condenser unit constructed in accordancewith my invention; Fig. 2 is an enlarged plan view partly in section of a unit of slightly modiiied'construction; Fig. 3 isV an enlarged section -of a partially formed condenser roll, showing the manner 1n which the sheets are wound upon the supporting tube; Fig. 4 1s an enlarged detail showing a somewhat modiiied construction of a condenser unit for use on polyphase circuits; Fig. 5 is a front elevation of a rack containing three groups of condenser units, the members of eachgroup being shown connected -in series; Fig. 6 shows a clip. for supporting the condenser unit in the rack; Fig. 7 shows an alternative holding means for use with a somewhat modified form of condenser, and Fig. 8 is a diagrammatic showing 'of an arrangement of Vcondenser units connected in circuit in multiple.

Referring to Fig. 1 of the drawings, my condenser unit comprises an outer metallic tubular casing 10 formed with a suitable cover 11 of insulating material. This cover is formed, with a central opening 12 within which is secured the upper end of a member 13 which as shown is'a metallic tube.V Tube 13 which is open at its lower end terminates somewhat above the bottom of the casing 1() and is provided adjacent its upper end with' perfor-ations 14. Tube 13- is closed at its top by means of a metallic plug or cap 18 upon which isformed a binding post 19. This plug and Ivbinding post constitute one of the filled with suitable 1921. Serial No. 472,155.

terminals of the condenser unit and also pro vide means whereby the casing 10 maybe insulating liquid. Intermediate the perforations 14 and the bottom of the tube 13 are wound condenser leaves in a manner shown in Fig. 3 of the drawing.

`These leaves comprise the conducting ele- `ments 15 and 1G between which are wound sheets of insulating material 17. The conducting sheet 15 is arranged to form contact with the tube 13 throughout the entire length of .its inner end. It is to be noted that the member 13 performs the functions of enabling the casing 10 to be filled with insulating liquid, supporting the condenser sheets. forming a terminal for the same and Aproviding a passage for the circulation of the liquid to prevent overheating. Conducting sheet 16 is secured to a metallic tube or `rod 20 depending from the cover 11 and formed at its upper end with a binding pos/t 21. This tube in the form shown in Fig. 1

1s in contact with the metallic casing'lO which in effect constitutes one terminal 'of Figs. 1 and 2 show three the condenser unit. tubes 2O equally spaced around the condenser roll. But one of these tubes, however, is formed. with a binding post, ,the remaining two being used merely for the purpose of properly spacing the roll from the casing. In athree phase condenser, a third conducting sheet will be wound upon the roll and ythis may be connected to a second tube 20 which will form a third terminal of the condenser. In this case-` however,l the second tube 20 should be insulated from the casing 10 in a manner shown in Fig. 4. In the manufacture of this condenser the usual method is employed, namely, drying the roll at a high temperature under atmospheric pressure, subsequent drying in a vacuum in a suitable vvessel and admitting oil to the vessel which is still under a vacuum.

In Fig. 5 I have shown a rack 25 containing three groups of ve units each, the members of each group being connected in circuit. The individual units are held in place by means of clips 23 secured to the back 24 of rack 25. The arrangement shown in Fig.

5 permits the ready removal of a defective los v shown in Fig. 8 of the drawing. It is preferable to include in circuit with a group of condensers in series such as is shown on one of the shelves of Fig. 5 a fuse 22 so that in case one of the condensers should become short-circuited, the circuit through the group will 'be broken to prevent injury to the remaining units.

In the modified form shown in Fig. 7 I provide an upper terminal 25 which is connected with the tube 13 and is formed with a rounded end adapted to cooperate with a socket 27 formed in thevclip 28. Similarly the lower terminal is formed by a projection 29 secured to the casing 10 and adapted-to be engaged by a clip 30.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention together with the apparatus which-I now consider to represent the best embodiment thereof; but

I desire to have it understood that the apparatus shown is only illustrative and that the invention can be" carried out by other means. What I claim as new and desire to secure by Letters Patent of the United States, is

1. The combination of a casing an insulating liquid therein, a filling tube passing into said casing and condenser elements mounted upon said tube and submerged in the liquid in'said casing.

2. The combination of a casing containing an insulating Huid, a filling tube extending into said iuid.- condenser elements mounted upon said tube in said Huid and means for insulating and spacing said casing provided with an insulating cover. a

conducting member depending from said cover, conducting sheets wound upon said member and insulated from one another, one of said sheets being electrically connected to said member and another of said sheets being electrically connected to said casing.

5. In an electrical lapparatus comprising A'a casing containing anV insulating fluid, a

filling tube for said casing forming a terminal for said apparatus and a cap closing the outer end of said tube and constructed to facilitate the attachment of a conductor.

.. and another of said sheetsbeing in electrical connection with )said casing.

7. The comblnatlon of a conductlng casing adapted to contain an insulating mee dium, a cover of insulating material for said casing. a conducting tube passing hthrough said cover into said casing, said tube communicating vwith 'the interior'of lsaid casing at upper and lower portions thereof, conducting condenser sheets. wound about said tube, ,said sheets being insulated from one another, one of said sheets being in electrical connection with the tube and another of said sheets' being in electrical connection with said casing anda conduct- 1n l means for closing the upper end of said tu e and forming a'connection with an eX- ternal circuit.v

8. The combination of a conducting casing adapted to contain an insulating liquid, an insulating cover for said casing. a conducting tube passing through said (cover and opening into said casing and a condenserwithin said casing surounding said tube and immersed in said liquid, one terminal of said condenser being connected to said casing and another terminal to said tu e.

9. The combination of a container adapted to contain 'an insulating liquid, electrical apparatus Within said container, and a filling tube for said container supporting said apparatus. l'

10. The Vcombi-nation of a container adapt-- ed to contain an insulating liquid. acondenser therein. and a hollow terminal member extending through the condenser. lsaid y terminal member having openings therein \.to.permit'the circulation of liquid through the condenser.

` 11. The combination of a casing, an insulating iuid therein. condenser elements immersed in said Huid. a cover for said casing and a combined filling tube and condenser supporting member secured to said cover.

In witness whereof` I have hereunto set my hand this twentieth dayr of May. 1921.

- ELIHU THOMSON. 

